I am loading all articles with Ajax but Addthis functionality is not correct
$thisChild.load( permLink + \' #thePostStuff\', function() {
And
I read this support post the other day, it might have to do with your problem: http://support.addthis.com/customer/portal/questions/240144-email-template-when-using-ajax-bug-?t=89322
If I understand it correctly he describes that after the first share, the widget gets disconnected from your profile and every future share (without refresh) does not get tracked or anything. his solution was declaring the pubid separately. I have no idea if this helps at all, but I thought it wouldn't hurt to show you what I found on the subject :)